OFPST_PORT_DESC reply (xid=0x2):
 1(vlan22): addr:a2:2a:e6:43:74:b1
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(eth1): addr:fa:16:3e:68:69:b4
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan20): addr:3a:07:2d:cb:c2:22
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan21): addr:8e:a0:29:3e:7d:d7
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:fa:16:3e:68:69:b4
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
